On Friday 26 February 2010 22:50:35 Linus Torvalds wrote: > > On Fri, 26 Feb 2010, Linus Torvalds wrote: > > > > so even if mmiotrace fixes it for others, it's not working for me. > > Side note: In case this is timing-related: the machine in question is a > dual-core 1.3Ghz CPU (Core 2 Duo U1400). I think SMP has always been > enabled, I don't think I ever tried UP. > > Also, in addition to the PIO fallback code, that particular mmiotrace test > was done with the "udelay(10)" added to the b43_write*() functions. So it > was even slower. > > Maybe the bug only happens on slow machines (and then the udelay obviously > wouldn't help!), I'm pretty sure it's triggered by some kind of BIOS background service. Power saving or something like that. There must be some interference that fucks up the memory link between machine->ssb->wireless. However, did you add the udelay to b43_write()? Please try to add it further down in the callchain into the lowlevel SSB read and write functions. drivers/ssb/pci.c I don't think it'll help at all, but it's worth a try. -- Greetings, Michael. -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
